A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

What do you get if you add 2 to 100 four times?

What will you call your mother's brother's brother-in-law?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

It belongs to you, but other people use it more than you do. What is it?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

Who always enjoys poor health?